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pcm.c
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1 /*
2  * PCM codecs
3  * Copyright (c) 2001 Fabrice Bellard
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /**
23  * @file
24  * PCM codecs
25  */
26 
27 #include "config.h"
28 #include "config_components.h"
29 #include "libavutil/attributes.h"
30 #include "libavutil/float_dsp.h"
31 #include "libavutil/mem.h"
32 #include "libavutil/reverse.h"
33 #include "libavutil/thread.h"
34 #include "avcodec.h"
35 #include "bytestream.h"
36 #include "codec_internal.h"
37 #include "decode.h"
38 #include "encode.h"
39 #include "pcm_tablegen.h"
40 
41 static av_cold int pcm_encode_init(AVCodecContext *avctx)
42 {
43  avctx->frame_size = 0;
44 #if !CONFIG_HARDCODED_TABLES
45  switch (avctx->codec->id) {
46 #define INIT_ONCE(id, name) \
47  case AV_CODEC_ID_PCM_ ## id: \
48  if (CONFIG_PCM_ ## id ## _ENCODER) { \
49  static AVOnce init_static_once = AV_ONCE_INIT; \
50  ff_thread_once(&init_static_once, pcm_ ## name ## _tableinit); \
51  } \
52  break
53  INIT_ONCE(ALAW, alaw);
54  INIT_ONCE(MULAW, ulaw);
55  INIT_ONCE(VIDC, vidc);
56  default:
57  break;
58  }
59 #endif
60 
61  avctx->bits_per_coded_sample = av_get_bits_per_sample(avctx->codec->id);
62  avctx->block_align = avctx->ch_layout.nb_channels * avctx->bits_per_coded_sample / 8;
63  avctx->bit_rate = avctx->block_align * 8LL * avctx->sample_rate;
64 
65  return 0;
66 }
67 
68 /**
69  * Write PCM samples macro
70  * @param type Datatype of native machine format
71  * @param endian bytestream_put_xxx() suffix
72  * @param src Source pointer (variable name)
73  * @param dst Destination pointer (variable name)
74  * @param n Total number of samples (variable name)
75  * @param shift Bitshift (bits)
76  * @param offset Sample value offset
77  */
78 #define ENCODE(type, endian, src, dst, n, shift, offset) \
79  samples_ ## type = (const type *) src; \
80  for (; n > 0; n--) { \
81  register type v = (*samples_ ## type++ >> shift) + offset; \
82  bytestream_put_ ## endian(&dst, v); \
83  }
84 
85 #define ENCODE_PLANAR(type, endian, dst, n, shift, offset) \
86  n /= avctx->ch_layout.nb_channels; \
87  for (c = 0; c < avctx->ch_layout.nb_channels; c++) { \
88  int i; \
89  samples_ ## type = (const type *) frame->extended_data[c]; \
90  for (i = n; i > 0; i--) { \
91  register type v = (*samples_ ## type++ >> shift) + offset; \
92  bytestream_put_ ## endian(&dst, v); \
93  } \
94  }
95 
96 static int pcm_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
97  const AVFrame *frame, int *got_packet_ptr)
98 {
99  int n, c, sample_size, v, ret;
100  const short *samples;
101  unsigned char *dst;
102  const uint8_t *samples_uint8_t;
103  const int16_t *samples_int16_t;
104  const int32_t *samples_int32_t;
105  const int64_t *samples_int64_t;
106  const uint16_t *samples_uint16_t;
107  const uint32_t *samples_uint32_t;
108 
109  sample_size = av_get_bits_per_sample(avctx->codec->id) / 8;
110  n = frame->nb_samples * avctx->ch_layout.nb_channels;
111  samples = (const short *)frame->data[0];
112 
113  if ((ret = ff_get_encode_buffer(avctx, avpkt, n * sample_size, 0)) < 0)
114  return ret;
115  dst = avpkt->data;
116 
117  switch (avctx->codec->id) {
118  case AV_CODEC_ID_PCM_U32LE:
119  ENCODE(uint32_t, le32, samples, dst, n, 0, 0x80000000)
120  break;
121  case AV_CODEC_ID_PCM_U32BE:
122  ENCODE(uint32_t, be32, samples, dst, n, 0, 0x80000000)
123  break;
124  case AV_CODEC_ID_PCM_S24LE:
125  ENCODE(int32_t, le24, samples, dst, n, 8, 0)
126  break;
127  case AV_CODEC_ID_PCM_S24LE_PLANAR:
128  ENCODE_PLANAR(int32_t, le24, dst, n, 8, 0)
129  break;
130  case AV_CODEC_ID_PCM_S24BE:
131  ENCODE(int32_t, be24, samples, dst, n, 8, 0)
132  break;
133  case AV_CODEC_ID_PCM_U24LE:
134  ENCODE(uint32_t, le24, samples, dst, n, 8, 0x800000)
135  break;
136  case AV_CODEC_ID_PCM_U24BE:
137  ENCODE(uint32_t, be24, samples, dst, n, 8, 0x800000)
138  break;
139  case AV_CODEC_ID_PCM_S24DAUD:
140  for (; n > 0; n--) {
141  uint32_t tmp = ff_reverse[(*samples >> 8) & 0xff] +
142  (ff_reverse[*samples & 0xff] << 8);
143  tmp <<= 4; // sync flags would go here
144  bytestream_put_be24(&dst, tmp);
145  samples++;
146  }
147  break;
148  case AV_CODEC_ID_PCM_U16LE:
149  ENCODE(uint16_t, le16, samples, dst, n, 0, 0x8000)
150  break;
151  case AV_CODEC_ID_PCM_U16BE:
152  ENCODE(uint16_t, be16, samples, dst, n, 0, 0x8000)
153  break;
154  case AV_CODEC_ID_PCM_S8:
155  ENCODE(uint8_t, byte, samples, dst, n, 0, -128)
156  break;
157  case AV_CODEC_ID_PCM_S8_PLANAR:
158  ENCODE_PLANAR(uint8_t, byte, dst, n, 0, -128)
159  break;
160 #if HAVE_BIGENDIAN
161  case AV_CODEC_ID_PCM_S64LE:
162  case AV_CODEC_ID_PCM_F64LE:
163  ENCODE(int64_t, le64, samples, dst, n, 0, 0)
164  break;
165  case AV_CODEC_ID_PCM_S32LE:
166  case AV_CODEC_ID_PCM_F32LE:
167  ENCODE(int32_t, le32, samples, dst, n, 0, 0)
168  break;
169  case AV_CODEC_ID_PCM_S32LE_PLANAR:
170  ENCODE_PLANAR(int32_t, le32, dst, n, 0, 0)
171  break;
172  case AV_CODEC_ID_PCM_S16LE:
173  ENCODE(int16_t, le16, samples, dst, n, 0, 0)
174  break;
175  case AV_CODEC_ID_PCM_S16LE_PLANAR:
176  ENCODE_PLANAR(int16_t, le16, dst, n, 0, 0)
177  break;
178  case AV_CODEC_ID_PCM_F64BE:
179  case AV_CODEC_ID_PCM_F32BE:
180  case AV_CODEC_ID_PCM_S64BE:
181  case AV_CODEC_ID_PCM_S32BE:
182  case AV_CODEC_ID_PCM_S16BE:
183 #else
184  case AV_CODEC_ID_PCM_S64BE:
185  case AV_CODEC_ID_PCM_F64BE:
186  ENCODE(int64_t, be64, samples, dst, n, 0, 0)
187  break;
188  case AV_CODEC_ID_PCM_F32BE:
189  case AV_CODEC_ID_PCM_S32BE:
190  ENCODE(int32_t, be32, samples, dst, n, 0, 0)
191  break;
192  case AV_CODEC_ID_PCM_S16BE:
193  ENCODE(int16_t, be16, samples, dst, n, 0, 0)
194  break;
195  case AV_CODEC_ID_PCM_S16BE_PLANAR:
196  ENCODE_PLANAR(int16_t, be16, dst, n, 0, 0)
197  break;
198  case AV_CODEC_ID_PCM_F64LE:
199  case AV_CODEC_ID_PCM_F32LE:
200  case AV_CODEC_ID_PCM_S64LE:
201  case AV_CODEC_ID_PCM_S32LE:
202  case AV_CODEC_ID_PCM_S16LE:
203 #endif /* HAVE_BIGENDIAN */
204  case AV_CODEC_ID_PCM_U8:
205  memcpy(dst, samples, n * sample_size);
206  break;
207 #if HAVE_BIGENDIAN
208  case AV_CODEC_ID_PCM_S16BE_PLANAR:
209 #else
210  case AV_CODEC_ID_PCM_S16LE_PLANAR:
211  case AV_CODEC_ID_PCM_S32LE_PLANAR:
212 #endif /* HAVE_BIGENDIAN */
213  n /= avctx->ch_layout.nb_channels;
214  for (c = 0; c < avctx->ch_layout.nb_channels; c++) {
215  const uint8_t *src = frame->extended_data[c];
216  bytestream_put_buffer(&dst, src, n * sample_size);
217  }
218  break;
219  case AV_CODEC_ID_PCM_ALAW:
220  for (; n > 0; n--) {
221  v = *samples++;
222  *dst++ = linear_to_alaw[(v + 32768) >> 2];
223  }
224  break;
225  case AV_CODEC_ID_PCM_MULAW:
226  for (; n > 0; n--) {
227  v = *samples++;
228  *dst++ = linear_to_ulaw[(v + 32768) >> 2];
229  }
230  break;
231  case AV_CODEC_ID_PCM_VIDC:
232  for (; n > 0; n--) {
233  v = *samples++;
234  *dst++ = linear_to_vidc[(v + 32768) >> 2];
235  }
236  break;
237  default:
238  return -1;
239  }
240 
241  *got_packet_ptr = 1;
242  return 0;
243 }
244 
245 typedef struct PCMDecode {
246  int sample_size;
247 } PCMDecode;
248 
249 static av_cold av_unused int pcm_decode_init(AVCodecContext *avctx)
250 {
251  PCMDecode *s = avctx->priv_data;
252  static const struct {
253  enum AVCodecID codec_id;
254  int8_t sample_fmt;
255  uint8_t sample_size;
256  uint8_t bits_per_sample;
257  } codec_id_to_samplefmt[] = {
258  #define ENTRY(CODEC_ID, SAMPLE_FMT, BITS_PER_SAMPLE) \
259  { AV_CODEC_ID_PCM_ ## CODEC_ID, AV_SAMPLE_FMT_ ## SAMPLE_FMT, \
260  BITS_PER_SAMPLE / 8, BITS_PER_SAMPLE }
261  ENTRY(S8, U8, 8), ENTRY(S8_PLANAR, U8P, 8),
262  ENTRY(S16BE, S16, 16), ENTRY(S16BE_PLANAR, S16P, 16),
263  ENTRY(S16LE, S16, 16), ENTRY(S16LE_PLANAR, S16P, 16),
264  ENTRY(S24DAUD, S16, 24), ENTRY(S24BE, S32, 24),
265  ENTRY(S24LE, S32, 24), ENTRY(S24LE_PLANAR, S32P, 24),
266  ENTRY(S32BE, S32, 32), ENTRY(S32LE, S32, 32),
267  ENTRY(S32LE_PLANAR, S32P, 32),
268  ENTRY(S64BE, S64, 64), ENTRY(S64LE, S64, 64),
269  ENTRY(SGA, U8, 8), ENTRY(U8, U8, 8),
270  ENTRY(U16BE, S16, 16), ENTRY(U16LE, S16, 16),
271  ENTRY(U24BE, S32, 24), ENTRY(U24LE, S32, 24),
272  ENTRY(U32BE, S32, 32), ENTRY(U32LE, S32, 32),
273  ENTRY(F32BE, FLT, 32), ENTRY(F32LE, FLT, 32),
274  ENTRY(F64BE, DBL, 64), ENTRY(F64LE, DBL, 64),
275  { .codec_id = AV_CODEC_ID_PCM_LXF, .sample_fmt = AV_SAMPLE_FMT_S32P, .sample_size = 5 },
276  };
277 
278  for (unsigned i = 0; i < FF_ARRAY_ELEMS(codec_id_to_samplefmt); ++i) {
279  if (codec_id_to_samplefmt[i].codec_id == avctx->codec_id) {
280  s->sample_size = codec_id_to_samplefmt[i].sample_size;
281  avctx->sample_fmt = codec_id_to_samplefmt[i].sample_fmt;
282  if (avctx->sample_fmt == AV_SAMPLE_FMT_S32)
283  avctx->bits_per_raw_sample = codec_id_to_samplefmt[i].bits_per_sample;
284  break;
285  }
286  av_assert1(i + 1 < FF_ARRAY_ELEMS(codec_id_to_samplefmt));
287  }
288 
289  return 0;
290 }
291 
292 typedef struct PCMScaleDecode {
293  PCMDecode base;
294  void (*vector_fmul_scalar)(float *dst, const float *src, float mul,
295  int len);
296  float scale;
297 } PCMScaleDecode;
298 
299 static av_cold av_unused int pcm_scale_decode_init(AVCodecContext *avctx)
300 {
301  PCMScaleDecode *s = avctx->priv_data;
302  AVFloatDSPContext *fdsp;
303 
304  avctx->sample_fmt = AV_SAMPLE_FMT_FLT;
305  s->base.sample_size = 4;
306 
307  if (avctx->bits_per_coded_sample < 1 || avctx->bits_per_coded_sample > 24)
308  return AVERROR_INVALIDDATA;
309 
310  s->scale = 1. / (1 << (avctx->bits_per_coded_sample - 1));
311  fdsp = avpriv_float_dsp_alloc(0);
312  if (!fdsp)
313  return AVERROR(ENOMEM);
314  s->vector_fmul_scalar = fdsp->vector_fmul_scalar;
315  av_free(fdsp);
316 
317  return 0;
318 }
319 
320 typedef struct PCMLUTDecode {
321  PCMDecode base;
322  int16_t table[256];
323 } PCMLUTDecode;
324 
325 static av_cold av_unused int pcm_lut_decode_init(AVCodecContext *avctx)
326 {
327  PCMLUTDecode *s = avctx->priv_data;
328 
329  switch (avctx->codec_id) {
330  case AV_CODEC_ID_PCM_ALAW:
331  for (int i = 0; i < 256; i++)
332  s->table[i] = alaw2linear(i);
333  break;
334  case AV_CODEC_ID_PCM_MULAW:
335  for (int i = 0; i < 256; i++)
336  s->table[i] = ulaw2linear(i);
337  break;
338  case AV_CODEC_ID_PCM_VIDC:
339  for (int i = 0; i < 256; i++)
340  s->table[i] = vidc2linear(i);
341  break;
342  }
343 
344  avctx->sample_fmt = AV_SAMPLE_FMT_S16;
345  s->base.sample_size = 1;
346 
347  return 0;
348 }
349 
350 /**
351  * Read PCM samples macro
352  * @param size Data size of native machine format
353  * @param endian bytestream_get_xxx() endian suffix
354  * @param src Source pointer (variable name)
355  * @param dst Destination pointer (variable name)
356  * @param n Total number of samples (variable name)
357  * @param shift Bitshift (bits)
358  * @param offset Sample value offset
359  */
360 #define DECODE(size, endian, src, dst, n, shift, offset) \
361  for (; n > 0; n--) { \
362  uint ## size ## _t v = bytestream_get_ ## endian(&src); \
363  AV_WN ## size ## A(dst, (uint ## size ## _t)(v - offset) << shift); \
364  dst += size / 8; \
365  }
366 
367 #define DECODE_PLANAR(size, endian, src, dst, n, shift, offset) \
368  n /= channels; \
369  for (c = 0; c < avctx->ch_layout.nb_channels; c++) { \
370  int i; \
371  dst = frame->extended_data[c]; \
372  for (i = n; i > 0; i--) { \
373  uint ## size ## _t v = bytestream_get_ ## endian(&src); \
374  AV_WN ## size ## A(dst, (uint ## size ##_t)(v - offset) << shift); \
375  dst += size / 8; \
376  } \
377  }
378 
379 static int pcm_decode_frame(AVCodecContext *avctx, AVFrame *frame,
380  int *got_frame_ptr, AVPacket *avpkt)
381 {
382  const uint8_t *src = avpkt->data;
383  int buf_size = avpkt->size;
384  PCMDecode *s = avctx->priv_data;
385  int channels = avctx->ch_layout.nb_channels;
386  int sample_size = s->sample_size;
387  int c, n, ret, samples_per_block;
388  uint8_t *samples;
389  int32_t *dst_int32_t;
390 
391  samples_per_block = 1;
392  if (avctx->codec_id == AV_CODEC_ID_PCM_LXF) {
393  /* we process 40-bit blocks per channel for LXF */
394  samples_per_block = 2;
395  }
396 
397  if (channels == 0) {
398  av_log(avctx, AV_LOG_ERROR, "Invalid number of channels\n");
399  return AVERROR(EINVAL);
400  }
401 
402  if (avctx->codec_id != avctx->codec->id) {
403  av_log(avctx, AV_LOG_ERROR, "codec ids mismatch\n");
404  return AVERROR(EINVAL);
405  }
406 
407  n = channels * sample_size;
408 
409  if (n && buf_size % n) {
410  if (buf_size < n) {
411  av_log(avctx, AV_LOG_ERROR,
412  "Invalid PCM packet, data has size %d but at least a size of %d was expected\n",
413  buf_size, n);
414  return AVERROR_INVALIDDATA;
415  } else
416  buf_size -= buf_size % n;
417  }
418 
419  n = buf_size / sample_size;
420 
421  /* get output buffer */
422  frame->nb_samples = n * samples_per_block / channels;
423  if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
424  return ret;
425  samples = frame->data[0];
426 
427  switch (avctx->codec_id) {
428  case AV_CODEC_ID_PCM_U32LE:
429  DECODE(32, le32, src, samples, n, 0, 0x80000000)
430  break;
431  case AV_CODEC_ID_PCM_U32BE:
432  DECODE(32, be32, src, samples, n, 0, 0x80000000)
433  break;
434  case AV_CODEC_ID_PCM_S24LE:
435  DECODE(32, le24, src, samples, n, 8, 0)
436  break;
437  case AV_CODEC_ID_PCM_S24LE_PLANAR:
438  DECODE_PLANAR(32, le24, src, samples, n, 8, 0);
439  break;
440  case AV_CODEC_ID_PCM_S24BE:
441  DECODE(32, be24, src, samples, n, 8, 0)
442  break;
443  case AV_CODEC_ID_PCM_U24LE:
444  DECODE(32, le24, src, samples, n, 8, 0x800000)
445  break;
446  case AV_CODEC_ID_PCM_U24BE:
447  DECODE(32, be24, src, samples, n, 8, 0x800000)
448  break;
449  case AV_CODEC_ID_PCM_S24DAUD:
450  for (; n > 0; n--) {
451  uint32_t v = bytestream_get_be24(&src);
452  v >>= 4; // sync flags are here
453  AV_WN16A(samples, ff_reverse[(v >> 8) & 0xff] +
454  (ff_reverse[v & 0xff] << 8));
455  samples += 2;
456  }
457  break;
458  case AV_CODEC_ID_PCM_U16LE:
459  DECODE(16, le16, src, samples, n, 0, 0x8000)
460  break;
461  case AV_CODEC_ID_PCM_U16BE:
462  DECODE(16, be16, src, samples, n, 0, 0x8000)
463  break;
464  case AV_CODEC_ID_PCM_S8:
465  for (; n > 0; n--)
466  *samples++ = *src++ + 128;
467  break;
468  case AV_CODEC_ID_PCM_SGA:
469  for (; n > 0; n--) {
470  int sign = *src >> 7;
471  int magn = *src & 0x7f;
472  *samples++ = sign ? 128 - magn : 128 + magn;
473  src++;
474  }
475  break;
476  case AV_CODEC_ID_PCM_S8_PLANAR:
477  n /= avctx->ch_layout.nb_channels;
478  for (c = 0; c < avctx->ch_layout.nb_channels; c++) {
479  int i;
480  samples = frame->extended_data[c];
481  for (i = n; i > 0; i--)
482  *samples++ = *src++ + 128;
483  }
484  break;
485 #if HAVE_BIGENDIAN
486  case AV_CODEC_ID_PCM_S64LE:
487  case AV_CODEC_ID_PCM_F64LE:
488  DECODE(64, le64, src, samples, n, 0, 0)
489  break;
490  case AV_CODEC_ID_PCM_S32LE:
491  case AV_CODEC_ID_PCM_F32LE:
492  case AV_CODEC_ID_PCM_F24LE:
493  case AV_CODEC_ID_PCM_F16LE:
494  DECODE(32, le32, src, samples, n, 0, 0)
495  break;
496  case AV_CODEC_ID_PCM_S32LE_PLANAR:
497  DECODE_PLANAR(32, le32, src, samples, n, 0, 0);
498  break;
499  case AV_CODEC_ID_PCM_S16LE:
500  DECODE(16, le16, src, samples, n, 0, 0)
501  break;
502  case AV_CODEC_ID_PCM_S16LE_PLANAR:
503  DECODE_PLANAR(16, le16, src, samples, n, 0, 0);
504  break;
505  case AV_CODEC_ID_PCM_F64BE:
506  case AV_CODEC_ID_PCM_F32BE:
507  case AV_CODEC_ID_PCM_S64BE:
508  case AV_CODEC_ID_PCM_S32BE:
509  case AV_CODEC_ID_PCM_S16BE:
510 #else
511  case AV_CODEC_ID_PCM_S64BE:
512  case AV_CODEC_ID_PCM_F64BE:
513  DECODE(64, be64, src, samples, n, 0, 0)
514  break;
515  case AV_CODEC_ID_PCM_F32BE:
516  case AV_CODEC_ID_PCM_S32BE:
517  DECODE(32, be32, src, samples, n, 0, 0)
518  break;
519  case AV_CODEC_ID_PCM_S16BE:
520  DECODE(16, be16, src, samples, n, 0, 0)
521  break;
522  case AV_CODEC_ID_PCM_S16BE_PLANAR:
523  DECODE_PLANAR(16, be16, src, samples, n, 0, 0);
524  break;
525  case AV_CODEC_ID_PCM_F64LE:
526  case AV_CODEC_ID_PCM_F32LE:
527  case AV_CODEC_ID_PCM_F24LE:
528  case AV_CODEC_ID_PCM_F16LE:
529  case AV_CODEC_ID_PCM_S64LE:
530  case AV_CODEC_ID_PCM_S32LE:
531  case AV_CODEC_ID_PCM_S16LE:
532 #endif /* HAVE_BIGENDIAN */
533  case AV_CODEC_ID_PCM_U8:
534  memcpy(samples, src, n * sample_size);
535  break;
536 #if HAVE_BIGENDIAN
537  case AV_CODEC_ID_PCM_S16BE_PLANAR:
538 #else
539  case AV_CODEC_ID_PCM_S16LE_PLANAR:
540  case AV_CODEC_ID_PCM_S32LE_PLANAR:
541 #endif /* HAVE_BIGENDIAN */
542  n /= avctx->ch_layout.nb_channels;
543  for (c = 0; c < avctx->ch_layout.nb_channels; c++) {
544  samples = frame->extended_data[c];
545  bytestream_get_buffer(&src, samples, n * sample_size);
546  }
547  break;
548  case AV_CODEC_ID_PCM_ALAW:
549  case AV_CODEC_ID_PCM_MULAW:
550  case AV_CODEC_ID_PCM_VIDC: {
551  const int16_t *const lut = ((PCMLUTDecode*)avctx->priv_data)->table;
552  int16_t *restrict samples_16 = (int16_t*)samples;
553 
554  for (; n > 0; n--)
555  *samples_16++ = lut[*src++];
556  break;
557  }
558  case AV_CODEC_ID_PCM_LXF:
559  {
560  int i;
561  n /= channels;
562  for (c = 0; c < channels; c++) {
563  dst_int32_t = (int32_t *)frame->extended_data[c];
564  for (i = 0; i < n; i++) {
565  // extract low 20 bits and expand to 32 bits
566  *dst_int32_t++ = ((uint32_t)src[2]<<28) |
567  (src[1] << 20) |
568  (src[0] << 12) |
569  ((src[2] & 0x0F) << 8) |
570  src[1];
571  // extract high 20 bits and expand to 32 bits
572  *dst_int32_t++ = ((uint32_t)src[4]<<24) |
573  (src[3] << 16) |
574  ((src[2] & 0xF0) << 8) |
575  (src[4] << 4) |
576  (src[3] >> 4);
577  src += 5;
578  }
579  }
580  break;
581  }
582  default:
583  return -1;
584  }
585 
586  if (avctx->codec_id == AV_CODEC_ID_PCM_F16LE ||
587  avctx->codec_id == AV_CODEC_ID_PCM_F24LE) {
588  PCMScaleDecode *s2 = avctx->priv_data;
589  s2->vector_fmul_scalar((float *)frame->extended_data[0],
590  (const float *)frame->extended_data[0],
591  s2->scale, FFALIGN(frame->nb_samples * avctx->ch_layout.nb_channels, 4));
592  }
593 
594  *got_frame_ptr = 1;
595 
596  return buf_size;
597 }
598 
599 #define PCM_ENCODER_0(id_, sample_fmt_, name_, long_name_)
600 #define PCM_ENCODER_1(id_, sample_fmt_, name_, long_name_) \
601 const FFCodec ff_ ## name_ ## _encoder = { \
602  .p.name = #name_, \
603  CODEC_LONG_NAME(long_name_), \
604  .p.type = AVMEDIA_TYPE_AUDIO, \
605  .p.id = id_, \
606  .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_VARIABLE_FRAME_SIZE | \
607  AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE, \
608  .init = pcm_encode_init, \
609  FF_CODEC_ENCODE_CB(pcm_encode_frame), \
610  CODEC_SAMPLEFMTS(sample_fmt_), \
611 }
612 
613 #define PCM_ENCODER_2(cf, id, sample_fmt, name, long_name) \
614  PCM_ENCODER_ ## cf(id, sample_fmt, name, long_name)
615 #define PCM_ENCODER_3(cf, id, sample_fmt, name, long_name) \
616  PCM_ENCODER_2(cf, id, sample_fmt, name, long_name)
617 #define PCM_ENCODER(id, sample_fmt, name, long_name) \
618  PCM_ENCODER_3(CONFIG_PCM_ ## id ## _ENCODER, AV_CODEC_ID_PCM_ ## id, \
619  AV_SAMPLE_FMT_ ## sample_fmt, pcm_ ## name, long_name)
620 
621 #define PCM_DECODER_0(id, sample_fmt, name, long_name, Context, init_func)
622 #define PCM_DECODER_1(id_, sample_fmt, name_, long_name, Context, init_func)\
623 const FFCodec ff_ ## name_ ## _decoder = { \
624  .p.name = #name_, \
625  CODEC_LONG_NAME(long_name), \
626  .p.type = AVMEDIA_TYPE_AUDIO, \
627  .p.id = id_, \
628  .priv_data_size = sizeof(Context), \
629  .init = init_func, \
630  FF_CODEC_DECODE_CB(pcm_decode_frame), \
631  .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_PARAM_CHANGE, \
632 }
633 
634 #define PCM_DECODER_2(cf, id, sample_fmt, name, long_name, Context, init_func) \
635  PCM_DECODER_ ## cf(id, sample_fmt, name, long_name, Context, init_func)
636 #define PCM_DECODER_3(cf, id, sample_fmt, name, long_name, Context, init_func) \
637  PCM_DECODER_2(cf, id, sample_fmt, name, long_name, Context, init_func)
638 #define PCM_DEC_EXT(id, sample_fmt, name, long_name, Context, init_func) \
639  PCM_DECODER_3(CONFIG_PCM_ ## id ## _DECODER, AV_CODEC_ID_PCM_ ## id, \
640  AV_SAMPLE_FMT_ ## sample_fmt, pcm_ ## name, long_name, \
641  Context, init_func)
642 
643 #define PCM_DECODER(id, sample_fmt, name, long_name) \
644  PCM_DEC_EXT(id, sample_fmt, name, long_name, PCMDecode, pcm_decode_init)
645 
646 #define PCM_CODEC(id, sample_fmt_, name, long_name_) \
647  PCM_ENCODER(id, sample_fmt_, name, long_name_); \
648  PCM_DECODER(id, sample_fmt_, name, long_name_)
649 
650 #define PCM_CODEC_EXT(id, sample_fmt, name, long_name, DecContext, dec_init_func) \
651  PCM_DEC_EXT(id, sample_fmt, name, long_name, DecContext, dec_init_func); \
652  PCM_ENCODER(id, sample_fmt, name, long_name)
653 
654 /* Note: Do not forget to add new entries to the Makefile and
655  * to the table in pcm_decode_init() as well. */
656 // AV_CODEC_ID_* pcm_* name
657 // AV_SAMPLE_FMT_* long name DecodeContext decode init func
658 PCM_CODEC_EXT(ALAW, S16, alaw, "PCM A-law / G.711 A-law", PCMLUTDecode, pcm_lut_decode_init);
659 PCM_DEC_EXT (F16LE, FLT, f16le, "PCM 16.8 floating point little-endian", PCMScaleDecode, pcm_scale_decode_init);
660 PCM_DEC_EXT (F24LE, FLT, f24le, "PCM 24.0 floating point little-endian", PCMScaleDecode, pcm_scale_decode_init);
661 PCM_CODEC (F32BE, FLT, f32be, "PCM 32-bit floating point big-endian");
662 PCM_CODEC (F32LE, FLT, f32le, "PCM 32-bit floating point little-endian");
663 PCM_CODEC (F64BE, DBL, f64be, "PCM 64-bit floating point big-endian");
664 PCM_CODEC (F64LE, DBL, f64le, "PCM 64-bit floating point little-endian");
665 PCM_DECODER (LXF, S32P,lxf, "PCM signed 20-bit little-endian planar");
666 PCM_CODEC_EXT(MULAW, S16, mulaw, "PCM mu-law / G.711 mu-law", PCMLUTDecode, pcm_lut_decode_init);
667 PCM_CODEC (S8, U8, s8, "PCM signed 8-bit");
668 PCM_CODEC (S8_PLANAR, U8P, s8_planar, "PCM signed 8-bit planar");
669 PCM_CODEC (S16BE, S16, s16be, "PCM signed 16-bit big-endian");
670 PCM_CODEC (S16BE_PLANAR, S16P,s16be_planar, "PCM signed 16-bit big-endian planar");
671 PCM_CODEC (S16LE, S16, s16le, "PCM signed 16-bit little-endian");
672 PCM_CODEC (S16LE_PLANAR, S16P,s16le_planar, "PCM signed 16-bit little-endian planar");
673 PCM_CODEC (S24BE, S32, s24be, "PCM signed 24-bit big-endian");
674 PCM_CODEC (S24DAUD, S16, s24daud, "PCM D-Cinema audio signed 24-bit");
675 PCM_CODEC (S24LE, S32, s24le, "PCM signed 24-bit little-endian");
676 PCM_CODEC (S24LE_PLANAR, S32P,s24le_planar, "PCM signed 24-bit little-endian planar");
677 PCM_CODEC (S32BE, S32, s32be, "PCM signed 32-bit big-endian");
678 PCM_CODEC (S32LE, S32, s32le, "PCM signed 32-bit little-endian");
679 PCM_CODEC (S32LE_PLANAR, S32P,s32le_planar, "PCM signed 32-bit little-endian planar");
680 PCM_CODEC (U8, U8, u8, "PCM unsigned 8-bit");
681 PCM_CODEC (U16BE, S16, u16be, "PCM unsigned 16-bit big-endian");
682 PCM_CODEC (U16LE, S16, u16le, "PCM unsigned 16-bit little-endian");
683 PCM_CODEC (U24BE, S32, u24be, "PCM unsigned 24-bit big-endian");
684 PCM_CODEC (U24LE, S32, u24le, "PCM unsigned 24-bit little-endian");
685 PCM_CODEC (U32BE, S32, u32be, "PCM unsigned 32-bit big-endian");
686 PCM_CODEC (U32LE, S32, u32le, "PCM unsigned 32-bit little-endian");
687 PCM_CODEC (S64BE, S64, s64be, "PCM signed 64-bit big-endian");
688 PCM_CODEC (S64LE, S64, s64le, "PCM signed 64-bit little-endian");
689 PCM_CODEC_EXT(VIDC, S16, vidc, "PCM Archimedes VIDC", PCMLUTDecode, pcm_lut_decode_init);
690 PCM_DECODER (SGA, U8, sga, "PCM SGA");
AV_CODEC_ID_PCM_S16LE
@ AV_CODEC_ID_PCM_S16LE
Definition: codec_id.h:335
AVCodecContext::frame_size
int frame_size
Number of samples per channel in an audio frame.
Definition: avcodec.h:1091
PCM_CODEC_EXT
#define PCM_CODEC_EXT(id, sample_fmt, name, long_name, DecContext, dec_init_func)
Definition: pcm.c:650
PCM_CODEC
#define PCM_CODEC(id, sample_fmt_, name, long_name_)
Definition: pcm.c:646
linear_to_alaw
static uint8_t linear_to_alaw[16384]
Definition: pcm_tablegen.h:99
AV_CODEC_ID_PCM_F32BE
@ AV_CODEC_ID_PCM_F32BE
Definition: codec_id.h:355
le32
uint64_t_TMPL AV_WL64 unsigned int_TMPL le32
Definition: bytestream.h:92
pcm_decode_init
static av_cold av_unused int pcm_decode_init(AVCodecContext *avctx)
Definition: pcm.c:249
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
ENCODE
#define ENCODE(type, endian, src, dst, n, shift, offset)
Write PCM samples macro.
Definition: pcm.c:78
pcm_tablegen.h
AVCodecContext::sample_rate
int sample_rate
samples per second
Definition: avcodec.h:1064
thread.h
vidc2linear
static av_cold int vidc2linear(unsigned char u_val)
Definition: pcm_tablegen.h:78
int64_t
long long int64_t
Definition: coverity.c:34
av_unused
#define av_unused
Definition: attributes.h:131
AV_CODEC_ID_PCM_S32LE_PLANAR
@ AV_CODEC_ID_PCM_S32LE_PLANAR
Definition: codec_id.h:364
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:410
tmp
static uint8_t tmp[11]
Definition: aes_ctr.c:28
AVPacket::data
uint8_t * data
Definition: packet.h:539
AV_CODEC_ID_PCM_S16BE_PLANAR
@ AV_CODEC_ID_PCM_S16BE_PLANAR
Definition: codec_id.h:365
encode.h
ff_reverse
const uint8_t ff_reverse[256]
Definition: reverse.c:23
AV_SAMPLE_FMT_S32P
@ AV_SAMPLE_FMT_S32P
signed 32 bits, planar
Definition: samplefmt.h:65
AV_CODEC_ID_PCM_U24LE
@ AV_CODEC_ID_PCM_U24LE
Definition: codec_id.h:349
AV_CODEC_ID_PCM_SGA
@ AV_CODEC_ID_PCM_SGA
Definition: codec_id.h:371
reverse.h
AVChannelLayout::nb_channels
int nb_channels
Number of channels in this layout.
Definition: channel_layout.h:329
AV_CODEC_ID_PCM_S16LE_PLANAR
@ AV_CODEC_ID_PCM_S16LE_PLANAR
Definition: codec_id.h:353
AV_CODEC_ID_PCM_S64LE
@ AV_CODEC_ID_PCM_S64LE
Definition: codec_id.h:366
AVCodecContext::codec
const struct AVCodec * codec
Definition: avcodec.h:460
AV_CODEC_ID_PCM_S16BE
@ AV_CODEC_ID_PCM_S16BE
Definition: codec_id.h:336
PCMScaleDecode::base
PCMDecode base
Definition: pcm.c:293
PCMScaleDecode::scale
float scale
Definition: pcm.c:296
AVCodecContext::ch_layout
AVChannelLayout ch_layout
Audio channel layout.
Definition: avcodec.h:1079
be24
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL be24
Definition: bytestream.h:97
le24
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL le24
Definition: bytestream.h:93
PCMLUTDecode
Definition: pcm.c:320
PCMScaleDecode::vector_fmul_scalar
void(* vector_fmul_scalar)(float *dst, const float *src, float mul, int len)
Definition: pcm.c:294
PCM_DECODER
#define PCM_DECODER(id, sample_fmt, name, long_name)
Definition: pcm.c:643
av_get_bits_per_sample
int av_get_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
Definition: utils.c:547
AV_CODEC_ID_PCM_S8
@ AV_CODEC_ID_PCM_S8
Definition: codec_id.h:339
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:209
FF_ARRAY_ELEMS
#define FF_ARRAY_ELEMS(a)
Definition: sinewin_tablegen.c:29
av_cold
#define av_cold
Definition: attributes.h:90
s
#define s(width, name)
Definition: cbs_vp9.c:198
AV_CODEC_ID_PCM_LXF
@ AV_CODEC_ID_PCM_LXF
Definition: codec_id.h:360
linear_to_ulaw
static uint8_t linear_to_ulaw[16384]
Definition: pcm_tablegen.h:100
AVCodecContext::bits_per_raw_sample
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
Definition: avcodec.h:1593
AV_CODEC_ID_PCM_F24LE
@ AV_CODEC_ID_PCM_F24LE
Definition: codec_id.h:369
channels
channels
Definition: aptx.h:31
decode.h
AV_WN16A
#define AV_WN16A(p, v)
Definition: intreadwrite.h:530
AV_CODEC_ID_PCM_MULAW
@ AV_CODEC_ID_PCM_MULAW
Definition: codec_id.h:341
AV_CODEC_ID_PCM_U16BE
@ AV_CODEC_ID_PCM_U16BE
Definition: codec_id.h:338
codec_id
enum AVCodecID codec_id
Definition: vaapi_decode.c:410
AVCodecContext::codec_id
enum AVCodecID codec_id
Definition: avcodec.h:461
if
if(ret)
Definition: filter_design.txt:179
AV_CODEC_ID_PCM_ALAW
@ AV_CODEC_ID_PCM_ALAW
Definition: codec_id.h:342
AV_CODEC_ID_PCM_U24BE
@ AV_CODEC_ID_PCM_U24BE
Definition: codec_id.h:350
AVFloatDSPContext::vector_fmul_scalar
void(* vector_fmul_scalar)(float *dst, const float *src, float mul, int len)
Multiply a vector of floats by a scalar float.
Definition: float_dsp.h:85
ENTRY
#define ENTRY(CODEC_ID, SAMPLE_FMT, BITS_PER_SAMPLE)
AV_CODEC_ID_PCM_U32BE
@ AV_CODEC_ID_PCM_U32BE
Definition: codec_id.h:346
AVCodecContext::bit_rate
int64_t bit_rate
the average bitrate
Definition: avcodec.h:501
AV_CODEC_ID_PCM_S64BE
@ AV_CODEC_ID_PCM_S64BE
Definition: codec_id.h:367
be64
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL be64
Definition: bytestream.h:95
pcm_lut_decode_init
static av_cold av_unused int pcm_lut_decode_init(AVCodecContext *avctx)
Definition: pcm.c:325
DECODE_PLANAR
#define DECODE_PLANAR(size, endian, src, dst, n, shift, offset)
Definition: pcm.c:367
pcm_decode_frame
static int pcm_decode_frame(AVCodecContext *avctx, AVFrame *frame, int *got_frame_ptr, AVPacket *avpkt)
Definition: pcm.c:379
be32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL be32
Definition: bytestream.h:96
c
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
AV_CODEC_ID_PCM_S24LE_PLANAR
@ AV_CODEC_ID_PCM_S24LE_PLANAR
Definition: codec_id.h:363
float_dsp.h
AVCodecID
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: codec_id.h:49
AV_CODEC_ID_PCM_VIDC
@ AV_CODEC_ID_PCM_VIDC
Definition: codec_id.h:370
pcm_encode_frame
static int pcm_encode_frame(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)
Definition: pcm.c:96
AV_CODEC_ID_PCM_S24LE
@ AV_CODEC_ID_PCM_S24LE
Definition: codec_id.h:347
ff_get_buffer
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: decode.c:1703
AVPacket::size
int size
Definition: packet.h:540
codec_internal.h
alaw2linear
static av_cold int alaw2linear(unsigned char a_val)
Definition: pcm_tablegen.h:46
dst
uint8_t ptrdiff_t const uint8_t ptrdiff_t int intptr_t intptr_t int int16_t * dst
Definition: dsp.h:83
for
for(k=2;k<=8;++k)
Definition: h264pred_template.c:424
AVCodecContext::sample_fmt
enum AVSampleFormat sample_fmt
audio sample format
Definition: avcodec.h:1071
AVFloatDSPContext
Definition: float_dsp.h:24
DECODE
#define DECODE(size, endian, src, dst, n, shift, offset)
Read PCM samples macro.
Definition: pcm.c:360
PCMLUTDecode::table
int16_t table[256]
Definition: pcm.c:322
ENCODE_PLANAR
#define ENCODE_PLANAR(type, endian, dst, n, shift, offset)
Definition: pcm.c:85
attributes.h
AVCodec::id
enum AVCodecID id
Definition: codec.h:201
PCMLUTDecode::base
PCMDecode base
Definition: pcm.c:321
AVCodecContext::bits_per_coded_sample
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
Definition: avcodec.h:1586
bytestream_put_buffer
static av_always_inline void bytestream_put_buffer(uint8_t **b, const uint8_t *src, unsigned int size)
Definition: bytestream.h:372
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:256
av_assert1
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:56
AV_CODEC_ID_PCM_F64BE
@ AV_CODEC_ID_PCM_F64BE
Definition: codec_id.h:357
AV_CODEC_ID_PCM_S32BE
@ AV_CODEC_ID_PCM_S32BE
Definition: codec_id.h:344
AV_SAMPLE_FMT_S16
@ AV_SAMPLE_FMT_S16
signed 16 bits
Definition: samplefmt.h:58
le64
uint64_t_TMPL le64
Definition: bytestream.h:91
AV_CODEC_ID_PCM_F16LE
@ AV_CODEC_ID_PCM_F16LE
Definition: codec_id.h:368
len
int len
Definition: vorbis_enc_data.h:426
avcodec.h
bytestream_get_buffer
static av_always_inline unsigned int bytestream_get_buffer(const uint8_t **b, uint8_t *dst, unsigned int size)
Definition: bytestream.h:363
ret
ret
Definition: filter_design.txt:187
AVCodecContext::block_align
int block_align
number of bytes per packet if constant and known or 0 Used by some WAV based audio codecs.
Definition: avcodec.h:1097
frame
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
Definition: filter_design.txt:264
be16
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_WB24 unsigned int_TMPL be16
Definition: bytestream.h:98
PCMDecode
Definition: pcm.c:245
le16
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL le16
Definition: bytestream.h:94
PCM_DEC_EXT
#define PCM_DEC_EXT(id, sample_fmt, name, long_name, Context, init_func)
Definition: pcm.c:638
linear_to_vidc
static uint8_t linear_to_vidc[16384]
Definition: pcm_tablegen.h:101
AVCodecContext
main external API structure.
Definition: avcodec.h:451
ff_get_encode_buffer
int ff_get_encode_buffer(AVCodecContext *avctx, AVPacket *avpkt, int64_t size, int flags)
Get a buffer for a packet.
Definition: encode.c:106
INIT_ONCE
#define INIT_ONCE(id, name)
AV_CODEC_ID_PCM_U32LE
@ AV_CODEC_ID_PCM_U32LE
Definition: codec_id.h:345
samples
Filter the word “frame” indicates either a video frame or a group of audio samples
Definition: filter_design.txt:8
AV_CODEC_ID_PCM_S32LE
@ AV_CODEC_ID_PCM_S32LE
Definition: codec_id.h:343
mem.h
AV_CODEC_ID_PCM_U8
@ AV_CODEC_ID_PCM_U8
Definition: codec_id.h:340
AV_CODEC_ID_PCM_S24DAUD
@ AV_CODEC_ID_PCM_S24DAUD
Definition: codec_id.h:351
pcm_encode_init
static av_cold int pcm_encode_init(AVCodecContext *avctx)
Definition: pcm.c:41
AV_CODEC_ID_PCM_F64LE
@ AV_CODEC_ID_PCM_F64LE
Definition: codec_id.h:358
av_free
#define av_free(p)
Definition: tableprint_vlc.h:34
FFALIGN
#define FFALIGN(x, a)
Definition: macros.h:78
AVCodecContext::priv_data
void * priv_data
Definition: avcodec.h:478
AVPacket
This structure stores compressed data.
Definition: packet.h:516
avpriv_float_dsp_alloc
av_cold AVFloatDSPContext * avpriv_float_dsp_alloc(int bit_exact)
Allocate a float DSP context.
Definition: float_dsp.c:146
PCMScaleDecode
Definition: pcm.c:292
AV_CODEC_ID_PCM_S8_PLANAR
@ AV_CODEC_ID_PCM_S8_PLANAR
Definition: codec_id.h:362
int32_t
int32_t
Definition: audioconvert.c:56
bytestream.h
AV_CODEC_ID_PCM_U16LE
@ AV_CODEC_ID_PCM_U16LE
Definition: codec_id.h:337
S8
static const uint32_t S8[256]
Definition: cast5.c:328
AV_CODEC_ID_PCM_F32LE
@ AV_CODEC_ID_PCM_F32LE
Definition: codec_id.h:356
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:61
PCMDecode::sample_size
int sample_size
Definition: pcm.c:246
pcm_scale_decode_init
static av_cold av_unused int pcm_scale_decode_init(AVCodecContext *avctx)
Definition: pcm.c:299
AV_SAMPLE_FMT_S32
@ AV_SAMPLE_FMT_S32
signed 32 bits
Definition: samplefmt.h:59
AV_CODEC_ID_PCM_S24BE
@ AV_CODEC_ID_PCM_S24BE
Definition: codec_id.h:348
AV_SAMPLE_FMT_FLT
@ AV_SAMPLE_FMT_FLT
float
Definition: samplefmt.h:60
ulaw2linear
static av_cold int ulaw2linear(unsigned char u_val)
Definition: pcm_tablegen.h:61
src
#define src
Definition: vp8dsp.c:248
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